Toyotomi TPN A128 IVP Service Manual page 28

Open condition:
Define the evaporator coil temp.T2 of the compressor just starts running as Tcool.
In the beginning 5 minutes after the compressor starts up, if T2 ＜Tcool－2℃ does not
keep
continuous 4 seconds and this situation happens 3 times, the display area will show "EC" and AC will
turn off.
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